manuel bojorquez reports on how much it could cost to rebuild. reporter: what s it looking like in there right now? it s probably the worst we could have ever thought. o donnell: and, cbs news health watch: colorectal cancer is the second leading cause of cancer deaths. pdr. jon lapook joins us to talk about a new study on colonoscopies. this is the cbs evening news with norah o donnell, reporting from the nation s capital. o donnell: good evening to our viewers in the west and thank you for joining us as we begin a new week together. well, tonight, the world s most powerful western nations are convening an emergency meeting tomorrow to address the increasingly dire situation in ukraine, after russia targeted civilian areas throughout the country. major cities were rocked by more than 80 russian missile strikes during the busy morning rush hour, in what appears to be the largest wave of attacks since the opening week of the war. one of the targets included a l